A型高墩大跨混凝土连续刚构桥地震反应影响分析
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摘要
A型高墩大跨混凝土连续刚构桥的显著特点是墩高、跨度大、梁体及墩身质量巨大。文章分析了P-Δ效应、行波效应对A型高墩大跨混凝土连续刚构桥地震反应的影响及弹塑性地震反应特点,探讨了A型高墩大跨混凝土连续刚构桥的延性抗震设计方法。结果表明:A型高墩连续刚构桥按有限延性的抗震设计比较合理,P-Δ效应对A型高墩大跨连续刚构桥地震反应的影响较小,设计中可以忽略;行波效应对A型高墩大跨连续刚构桥地震反应的影响应结合具体的桥型、桥址场地类别,选取合理的地震动、恰当的行波速度进行分析。
Remarkable characteristics of A type high pier and long span concrete continuous rigid frame bridge are high pier,larye span,massive girder and pier. This paper analyzes the influence of P-delta effect,the traveling wave effect on the A type high pier and long-span continuous rigid frame bridge seismic response of concrete and elastic plastic response characteristics of earthquake,it also discusses the seismic ductility design method of A type high pier and long span concrete continuous rigid frame bridge. The results showed that: A type continuous rigid frame bridge with high piers on seismic design limited ductility is reasonable,P-delta has little effect on type A high pier and long-span continuous rigid frame bridge's response in earthquake,which cauld be ignared in design; traveling wave effect on the A type high pier and long-span continuous rigid frame bridge response earthquake should be combined with a specific type of bridge and bridge site selection. Reasonable seismic wave velocity and proper travelling wave speed should be selected in analysis. The research could sexve as a reference for high pier and long-span Railway Bridge design.
Remarkable characteristics of A type high pier and long span concrete continuous rigid frame bridge are high pier,larye span,massive girder and pier. This paper analyzes the influence of P-delta effect,the traveling wave effect on the A type high pier and long-span continuous rigid frame bridge seismic response of concrete and elastic plastic response characteristics of earthquake,it also discusses the seismic ductility design method of A type high pier and long span concrete continuous rigid frame bridge. The results showed that: A type continuous rigid frame bridge with high piers on seismic design limited ductility is reasonable,P-delta has little effect on type A high pier and long-span continuous rigid frame bridge's response in earthquake,which cauld be ignared in design; traveling wave effect on the A type high pier and long-span continuous rigid frame bridge response earthquake should be combined with a specific type of bridge and bridge site selection. Reasonable seismic wave velocity and proper travelling wave speed should be selected in analysis. The research could sexve as a reference for high pier and long-span Railway Bridge design.
引文
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[9]张永亮,陈兴冲,胡波,等.考虑几何非线性影响的大跨度拱桥静动力分析[J].兰州交通大学学报,2008,27(1):21-23.ZHANG Yongliang,CHEN Xingchong,Hu Bo,et al.Static and Dynamic Analysis of Long Span Arch Bridge Considering Geometric Nonlinearity[J].Journal of Lanzhou Jiaotong University,2008,27(1):21-23.
[10]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu,HU Shide,YE Aijun.Seismic Design for Long Span Bridges[M].Beijing:China Communications Press,2001.
[11]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报:自然科学版,2001,29(10):1213-1219.PAN Danguang,LOU Menglin,FAN Lichu.Status of Seismic Response Analysis of Long-span Structures under Multiple Support Excitations[J].Journal of Tongji University:Natural Science,2001,29(10):1213-1219.
[12]钟万勰,林家浩,吴志刚,等.大跨度桥梁分析方法的一些进展[J].大连理工大学学报,2000,40(2):127-135.ZHONG Wanxie,LIN Jiahao,WU Zhigang,et al.Development of Analytical Method for Long SHpan Bridges[J].Journal of Dalian University of Technology,2000,40(2):127-135.
[2]夏修身,陈兴冲,王常峰,等.高墩大跨连续刚构桥抗震性能研究[J].西北地震学报,2010,32(1):88-91.XIA Xiushen,CHEN Xingchong,WANG Changfeng,et al.Study on Seismic Performance of Tall-pier and Long-span Continuous Rigidframed Bridge[J].Northwestern Seismological Journal,2010,32(1):88-91.
[3]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.FAN Lichu,ZHUO Weidong.Seismic Design for Ductility of Bridge[M].Beijing:China Communications Press,2001.
[4]Eurocode 8-Design Provisions for Earthquake Resistance of Structures-Part 2:Bridges[S],1998:2005.
[5]胡聿贤.地震工程学[M].北京:地震出版社,2006.HU Yuxian.Earthquake Engineering[M].Beijing:Seismological Press,2006.
[6]JTGT B02-01-2008公路桥梁抗震设计细则[S].JTGT B02-01-2008.Guidelines for Seismic Design of Highway Bridge[S].
[7]李睿,董明.考虑P-Δ效应的高墩抗震计算[J].云南工业大学学报,1999,15(1):61-66.LI Rui,DONG Ming.Aseismic Response Analysis of High Pier Including the Effect of Geometrical Nonlinearity[J].Journal of Yunnan Polytechnic University,1999,15(1):61-66.
[8]刘坤,陈兴冲,夏修身.铁路空心高墩的地震反应分析[J].兰州交通大学学报,2005,24(4):20-23.LIU Kun,CHEN Xingchong,XIA Xiushen.Analysis of Seismic Response of Railway Hollow High Pier[J].Journal of Lanzhou Jiaotong University,2005,24(4):20-23.
[9]张永亮,陈兴冲,胡波,等.考虑几何非线性影响的大跨度拱桥静动力分析[J].兰州交通大学学报,2008,27(1):21-23.ZHANG Yongliang,CHEN Xingchong,Hu Bo,et al.Static and Dynamic Analysis of Long Span Arch Bridge Considering Geometric Nonlinearity[J].Journal of Lanzhou Jiaotong University,2008,27(1):21-23.
[10]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu,HU Shide,YE Aijun.Seismic Design for Long Span Bridges[M].Beijing:China Communications Press,2001.
[11]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报:自然科学版,2001,29(10):1213-1219.PAN Danguang,LOU Menglin,FAN Lichu.Status of Seismic Response Analysis of Long-span Structures under Multiple Support Excitations[J].Journal of Tongji University:Natural Science,2001,29(10):1213-1219.
[12]钟万勰,林家浩,吴志刚,等.大跨度桥梁分析方法的一些进展[J].大连理工大学学报,2000,40(2):127-135.ZHONG Wanxie,LIN Jiahao,WU Zhigang,et al.Development of Analytical Method for Long SHpan Bridges[J].Journal of Dalian University of Technology,2000,40(2):127-135.
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